In my web view, I'm using CSS variables to change various colors at runtime depending on whether macOS 10.14's dark mode is enabled. That much is working fine. The tricky part is updating the color...

I want to use my color assets from the assets catalog using color literals. In UIKit, we can directly use color literal is there any way to use color literals in SwiftUI I have searched from Color ...

I'm trying to convert an NSColor to RGB, but it seems to give an entirely incorrect result: NSColor *testColor = [NSColor colorWithCalibratedWhite:0.65 alpha:1.0]; const CGFloat* components = CGC...

I have an NSImage. I would like to read the NSColor for a pixel at some x and y. Xcode seems to thing that there is a colorAtX:y: method on NSImage, but this causes a crash saying that there is no ...

I have found that time of the string colouring depends on how many different NSColors are used. In code below if I use only one colour for the three cases then the text colouring process is 3 times...

There are several convenience class methods for creating a NSColor. However, I can't seem to identify when to use the different class methods below: colorWithSRGBRed:green:blue:alpha: vs colorWith...

In my application, i will get RGB Values as a unsigned character so it will not be more then 255, I am using NSColor API to create the color and will make use of it to draw the font and background...

As discussed elsewhere, NSTabView does not have a setBackgroundColor method and subclassing NSTabView and using an drawRect to control it does no longer work - as it does not paint the top 10%, the...

I'm trying to make a NSObject subclass that will have a lot of methods that return colors, so I wanna return UIColor if I'm building for iOS or NSColor if I'm building for OS X. This is kind of a p...

I'm making an OS X app which creates a color scheme from the main colors of an image. As a first step, I'm using NSCountedSet and colorAtX to get all the colors from an image and count their occur...

I'm working on an app that has a custom NSView on a NSStatusBar which performs all of the drawing when the user clicks it. But here's the problem, the color I'm currently drawing as the view's back...

I am creating a custom view for an NSMenuItem. In order to draw the background when selected, I adapted a couple of lines from the CustomMenus sample. The CustomMenus sample has: [[NSColor altern...

What's the difference between UIColor and NSColor, and when would one use each? I came across NSColor while trying to figure out UIColor uses for attributed strings in iOS. I understand the use of ...

What would be the best (as in: most concise) way for setting just the alpha component of a predefined color? Say I'd like to use something like + (NSColor *)brownColor but with 50% opacity - I cou...

I'm looking for a way to invert arbitrary NSColor values at runtime, and there doesn't appear to be any built-in method to do so. I will be using a category to extend NSColor as follows: NSColor * ...

Mountain Lion introduced new APIs, some of which we had implemented as categories in our project. For examples, we have a category NSColor+CGColorAdditions that implemented CGColor and colorWithCG...